Following a recent reminder by LifeHacker I have been playing around with Google Trends. Very interesting.
So, I plumbed in a query of Microsoft Cardspace searches compared with OpenID.
Question: What was announced or happened mid-August to cause the last peak for both areas?
cardspace
openid

Windows CardSpace, OpenID collaboration project in the works
Ars Technica - Feb 7 2007
Microsoft Courts OpenID
Dr. Dobb's Journal - Feb 7 2007
Secure Your ASP.NET Apps And WCF Services With Windows CardSpace
MSDN Magazine - Apr 15 2007
Sun Microsystems Announces OpenID Program
Earthtimes.org - May 7 2007
Wetpaint Adds OpenID and Google Analytics Support With Release of New Home Page
Market Wire (press release) - Jun 6 2007
OpenID: Can it become single sign-on for the Web
iT News - Sep 3 2007